Unlike an allergy, a food intolerance does not involve the immune system, and the tests and treatments are different.
Food intolerance happens if your gut is sensitive to certain foods. This can cause gut symptoms such as:
- stomach pain
The symptoms may be delayed and usually come on from about half an hour after eating the food, although they can sometimes start much later. They often only happen if you eat a large amount of the food.
If you think you have an intolerance to onion, garlic or other alliums, speak to your GP to discuss an exclusion diet followed by reintroduction. They can refer you to a dietitian to help you manage the condition, if needed.